W10_103_3c_sedstruc

W10_103_3c_sedstruc - Sedimentary Structures Strata on Mars...

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Sedimentary Structures “Strata” on Mars (2004) Strata f cation Bedding (1-300 cm) Laminations (<1 cm) Massive Strata (>300 cm)
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Inter-Bed Structures (within strata) •Graded Beds •Cross Beds •Soft Sediment Deformation •Dropstones Outcrop of turbidites, Carboniferous, northwestern China. Graded Beds Death Valley, CA
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Cross Beds Zion National Park, UT
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Mars - Crossbeds Soft Sediment Deformation image credit: Roger Suthren. Bude Formation, Upper Carboniferous, N Cornwall
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Dropstones Norway Intra-Bed Structures (on the surface of strata) •Ripple Marks •Mudcracks •Raindrop Impressions •Flute Marks
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Ripple Marks Mudcracks Glacier National Park, MT
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Raindrop Impressions Flute Marks
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Fossils Unaltered Remains (Usually “younger” fossils) Amber Mammoth Hair 2,400yr old Bog Man, Denmark Subfossil Wood
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“Fossilized” Remains Permineralization Replacement Carbonization Molds and Casts Cast - Paleozoic Crinoid Mold - Pennsylvanian Shark’s Jaw
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“Trace Fossils” Track : an impression made by a single foot.
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This note was uploaded on 01/11/2012 for the course GEO 103 taught by Professor Robviens during the Winter '10 term at Bellevue College.

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W10_103_3c_sedstruc - Sedimentary Structures Strata on Mars...

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